I made this in Hexagon as a test. Still needs some work and the center section which is easy.

I made this from 3 interpolated lines using double sweep.
Welded
Copy, rotate the group staggering the group three times to get the full bloom
Grouped the four copies, copied, welded, sized and welded
Thickened external slightly
Smoothed
Welded all
3 duplicated roses in image

I do not use Hexagon, rather Carrara but if I wanted to make a rose
(no need, have nice ones others have made already for my renders)
I would make a petal and go from there, duplicating and slightly reshaping and joining them into a flower.
like the ones I used to make from royal icing to stick on cakes!